Malicious PDF — malware analysis report

Static analysis result for SHA-256 065ea0f30f6a04f1…

MALICIOUS

PDF

44.1 KB Created: 2020-08-29 04:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b20138a0ee780f2dbc835a3eb1e65822 SHA-1: ced2af8291fc4ec072675385c4d747d7f7bd5a58 SHA-256: 065ea0f30f6a04f13692eb6367e6a88c11814ff7a6c07dffe11102c940d74fc7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The document also exhibits characteristics of a link farm, with numerous external PDF links, many pointing to benign Shopify domains but one critical redirector. The presence of a remote-support tool lure suggests an attempt to gain unauthorized access or trick the user into installing potentially unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.link/wix?keyword=norton+toolbar+firefox+39.+0
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/7932/7137/files/zibit.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/74088908400.pdf
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/46420802362.pdf
    • https://static.usrfiles.com/ugd/b8c837_32fe25f75ec94347bb927212096f365a.pdf
    • https://static.usrfiles.com/ugd/b8c837_e1e15348104e4cf1a43f89dd17fac07f.pdf
    • https://static.usrfiles.com/ugd/b8c837_506724a12a4b45fea7f9a92acaa957f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_275cda56b0994275b542f2aee5bec5c1.pdf
    • https://cdn.shopify.com/s/files/1/0430/5482/5621/files/wupogo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/23405967574.pdf
    • https://cdn.shopify.com/s/files/1/0427/8855/2870/files/english_to_portuguese_translation_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/site_reliability_engineering_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0437/4819/6506/files/articles_on_entrepreneurship_and_innovation.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000632c.bin
11ed3b7ed2acc9d0049c858aeb9d2192fb7cd0d479dfe8cb5b8a56099b47ec9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x632C 5044 bytes
font_01_sfnt_off00007462.bin
0b1e151c6fcfed2d47e693f6be22e71240f8e7469eb1dd8ab66dd11a8455c6f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7462 9812 bytes
font_02_sfnt_off000095ee.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95EE 4324 bytes

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